fly block


noun Machinery, Nautical.

(in a Spanish burton or the like) a block, supported by a runner, through which the hauling part of the fall is rove.
any block that shifts with the movement of its tackle.

Origin of fly block

First recorded in 1835–45
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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